Left 4 Dead - The Sacrifice
"The Sacrifice" ― The aftermath of "Blood Harvest" and the comic are told in "The Sacrifice". The Survivors arrive in a shipyard by train and must battle their way through constant hordes, an imprisoned Tank, and some rather bothersome birds in hopes of finding a working sailboat. Unfortunately, the almost flawless plan to raise the bridge and escape the largest horde anyone has ever witnessed goes awry after one of the generators malfunctions. In order to save the others, one of the Survivors must sacrifice themselves so that the others may proceed. Canonically, this Survivor is Bill, but in the campaign, anyone may do so.